<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <script>
        // 1. 定义变量
        num1=10,num2=10,num3=10
        var name1='mmmmm';
        var temp = name1;
    </script>

</body>

</html>